77663336677 has 2 divisors, whose sum is σ = 77663336678. Its totient is φ = 77663336676.

The previous prime is 77663336659. The next prime is 77663336717.

It is a happy number.

77663336677 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47489562241 + 30173774436 = 217921^2 + 173706^2 .

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77663336677 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77663336617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38831668338 + 38831668339.

It is an arithmetic number, because the mean of its divisors is an integer number (38831668339).

Almost surely, 2^77663336677 is an apocalyptic number.

It is an amenable number.

77663336677 is a deficient number, since it is larger than the sum of its proper divisors (1).

77663336677 is an equidigital number, since it uses as much as digits as its factorization.

77663336677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84015792, while the sum is 61.

The spelling of 77663336677 in words is "seventy-seven billion, six hundred sixty-three million, three hundred thirty-six thousand, six hundred seventy-seven".